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 *  The ASF licenses this file to You under the Apache License, Version 2.0
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 *  the License.  You may obtain a copy of the License at
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 *      http://www.apache.org/licenses/LICENSE-2.0
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package org.apache.commons.collections.map;

import org.apache.commons.collections.MapIterator;
import org.apache.commons.collections.OrderedMap;
import org.apache.commons.collections.OrderedMapIterator;

Provides a base decorator that enables additional functionality to be added to an OrderedMap via decoration.

Methods are forwarded directly to the decorated map.

This implementation does not perform any special processing with the map views. Instead it simply returns the set/collection from the wrapped map. This may be undesirable, for example if you are trying to write a validating implementation it would provide a loophole around the validation. But, you might want that loophole, so this class is kept simple.

Author:Stephen Colebourne
Since:Commons Collections 3.0
Version:$Revision: 646777 $ $Date: 2008-04-10 14:33:15 +0200 (Thu, 10 Apr 2008) $
/** * Provides a base decorator that enables additional functionality to be added * to an OrderedMap via decoration. * <p> * Methods are forwarded directly to the decorated map. * <p> * This implementation does not perform any special processing with the map views. * Instead it simply returns the set/collection from the wrapped map. This may be * undesirable, for example if you are trying to write a validating implementation * it would provide a loophole around the validation. * But, you might want that loophole, so this class is kept simple. * * @since Commons Collections 3.0 * @version $Revision: 646777 $ $Date: 2008-04-10 14:33:15 +0200 (Thu, 10 Apr 2008) $ * * @author Stephen Colebourne */
public abstract class AbstractOrderedMapDecorator extends AbstractMapDecorator implements OrderedMap {
Constructor only used in deserialization, do not use otherwise.
Since:Commons Collections 3.1
/** * Constructor only used in deserialization, do not use otherwise. * @since Commons Collections 3.1 */
protected AbstractOrderedMapDecorator() { super(); }
Constructor that wraps (not copies).
Params:
  • map – the map to decorate, must not be null
Throws:
/** * Constructor that wraps (not copies). * * @param map the map to decorate, must not be null * @throws IllegalArgumentException if the collection is null */
public AbstractOrderedMapDecorator(OrderedMap map) { super(map); }
Gets the map being decorated.
Returns:the decorated map
/** * Gets the map being decorated. * * @return the decorated map */
protected OrderedMap getOrderedMap() { return (OrderedMap) map; } //----------------------------------------------------------------------- public Object firstKey() { return getOrderedMap().firstKey(); } public Object lastKey() { return getOrderedMap().lastKey(); } public Object nextKey(Object key) { return getOrderedMap().nextKey(key); } public Object previousKey(Object key) { return getOrderedMap().previousKey(key); } public MapIterator mapIterator() { return getOrderedMap().mapIterator(); } public OrderedMapIterator orderedMapIterator() { return getOrderedMap().orderedMapIterator(); } }